You may remember, if you think back hard, that we reviewed the trailer for Snow White and the Huntsman earlier today. It's a new reworking of the Snow White story where Kristen Stewart plays Snow White, Charlize Theron plays the evil queen, Thor plays the hunstman and the audience plays the part of whoever it is in Snow White that looks bored and slightly appalled by everything they see.

Since then, however, there have been developments. In the wake of the Snow White and the Huntsman trailer, Mirror, Mirror – a competing Snow White movie directed by Tarsem Singh – has rushed out a trailer of its own. This, clearly, means war. Both films are determined to be the dominant Snow White film of sping/summer 2012. Your grandchildren will discuss the Great Snow White-Off Of 2012 in the same hushed tones that historians currently use to describe the Battle of Hastings. But there can only be one winner. So will Mirror, Mirror defeat Snow White and the Huntsman? Let's pick through its trailer for clues ...

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1) Already we can see that Mirror, Mirror will be vastly different to Snow White and the Huntsman. Just look at Snow White here – in a bold swerve from convention, she actually looks like Snow White and is smiling. It seems like Mirror, Mirror will be the happy Snow White film, and Snow White and the Huntsmen will be the miserable Twilighty one.

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2) And then there's the evil queen. You'll remember that in Snow White and the Huntsman, Charlize Theron goes around strangling people and stabbing people and transforming into a flock of crows for no real reason. Not here, though – in Mirror, Mirror the evil queen is played by Julia Roberts, and the most evil thing she does is pull funny faces at the dinner table.

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3) But don't worry, because Julia Roberts does get more evil. And when I say "evil", I mean "comically disgruntled". This is a bit disappointing. Let's give her one more chance. Do your worst, evil queen.

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4) Oh dear. Now you're fretting over your wrinkles. This isn't very evil at all, Julia Roberts. Have you seen what Charlize Theron is doing? She's dousing herself with Tipp-Ex and actually stabbing people to death. I'll come back to you soon, Julia, but know that you need to up your game.

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5) Elsewhere Mirror, Mirror differentiates itself from Snow White and the Huntsman by having a visible Prince Charming. Admittedly he's the world's smuggest Prince Charming, and if you look at this screengrab for long enough you'll want to push him down some stairs, but it's still one up from its competitor, right?

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6) Meanwhile, Julia Roberts is still trying to prove that she's actually evil. "Look!" she cries. "I'm doing a sassy double finger-click! That's totally evil! I saw a recovering alcoholic woman do it during an episode of Maury once! This is evil, isn't it?" No, Julia. No it's not.

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7) Still, at least Mirror, Mirror has dwarves in it. Proper dwarves too, not the disfigured grotesques of Snow White and the Hunstmen. And look – these dwarves are all bumping into each other. And, later on in the trailer, they'll yell "Snow who? Snow White? SNOW WAY!" to each other. They're funny dwarves! Mirror, Mirror is going to be hilarious!

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8) Back to Julia Roberts now, for her last shot at convincing us she's capable of evil. In an attempt to woo Prince Charming away from Snow White, she decides to spike his drink with love potion and keep him for herself. And that is actually fairly evil. Well done, Julia Roberts, you've redeemed yourself.

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9) Except … no, what's this? Prince Charming is licking Julia Roberts's face like a dog? Because she accidentally gave him puppy love potion instead of real love potion? That's brilliant. Mirror, Mirror is going to be a riot. I mean, Julia Roberts is a terrible evil queen, but this trailer is totally LOL city.

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10) And then this happens. God knows why. It doesn't matter, though. Little men dressed up as wolves is comedy gold. Amazing. LOL city, I tell you. LOL city.